In systemd 223 through 235, a remote DNS server can respond with a custom crafted DNS NSEC resource record to trigger an infinite loop in the dnspacketreadtypewindow() function of the 'systemd-resolved' service and cause a DoS of the affected service.
{
"unresolved_ranges": [
{
"source": "CPE_STRING",
"cpes": [
"cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:lts:*:*:*",
"cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:lts:*:*:*"
],
"vendor_product": "canonical:ubuntu_linux",
"extracted_events": [
{
"introduced": "14.04"
},
{
"last_affected": "14.04"
},
{
"introduced": "16.04"
},
{
"last_affected": "16.04"
}
]
}
]
}{
"cpe": [
"cpe:2.3:a:systemd_project:systemd:223:*:*:*:*:*:*:*",
"cpe:2.3:a:systemd_project:systemd:224:*:*:*:*:*:*:*",
"cpe:2.3:a:systemd_project:systemd:225:*:*:*:*:*:*:*",
"cpe:2.3:a:systemd_project:systemd:226:*:*:*:*:*:*:*",
"cpe:2.3:a:systemd_project:systemd:227:*:*:*:*:*:*:*",
"cpe:2.3:a:systemd_project:systemd:228:*:*:*:*:*:*:*",
"cpe:2.3:a:systemd_project:systemd:229:*:*:*:*:*:*:*",
"cpe:2.3:a:systemd_project:systemd:230:*:*:*:*:*:*:*",
"cpe:2.3:a:systemd_project:systemd:231:*:*:*:*:*:*:*",
"cpe:2.3:a:systemd_project:systemd:232:*:*:*:*:*:*:*",
"cpe:2.3:a:systemd_project:systemd:233:*:*:*:*:*:*:*",
"cpe:2.3:a:systemd_project:systemd:234:*:*:*:*:*:*:*",
"cpe:2.3:a:systemd_project:systemd:235:*:*:*:*:*:*:*"
],
"source": "CPE_STRING",
"extracted_events": [
{
"introduced": "223"
},
{
"last_affected": "223"
},
{
"introduced": "224"
},
{
"last_affected": "224"
},
{
"introduced": "225"
},
{
"last_affected": "225"
},
{
"introduced": "226"
},
{
"last_affected": "226"
},
{
"introduced": "227"
},
{
"last_affected": "227"
},
{
"introduced": "228"
},
{
"last_affected": "228"
},
{
"introduced": "229"
},
{
"last_affected": "229"
},
{
"introduced": "230"
},
{
"last_affected": "230"
},
{
"introduced": "231"
},
{
"last_affected": "231"
},
{
"introduced": "232"
},
{
"last_affected": "232"
},
{
"introduced": "233"
},
{
"last_affected": "233"
},
{
"introduced": "234"
},
{
"last_affected": "234"
},
{
"introduced": "235"
},
{
"last_affected": "235"
}
]
}{
"cpe": [
"cpe:2.3:a:systemd_project:systemd:223:*:*:*:*:*:*:*",
"cpe:2.3:a:systemd_project:systemd:224:*:*:*:*:*:*:*",
"cpe:2.3:a:systemd_project:systemd:225:*:*:*:*:*:*:*",
"cpe:2.3:a:systemd_project:systemd:226:*:*:*:*:*:*:*",
"cpe:2.3:a:systemd_project:systemd:227:*:*:*:*:*:*:*",
"cpe:2.3:a:systemd_project:systemd:228:*:*:*:*:*:*:*",
"cpe:2.3:a:systemd_project:systemd:229:*:*:*:*:*:*:*",
"cpe:2.3:a:systemd_project:systemd:230:*:*:*:*:*:*:*",
"cpe:2.3:a:systemd_project:systemd:231:*:*:*:*:*:*:*",
"cpe:2.3:a:systemd_project:systemd:232:*:*:*:*:*:*:*",
"cpe:2.3:a:systemd_project:systemd:233:*:*:*:*:*:*:*",
"cpe:2.3:a:systemd_project:systemd:234:*:*:*:*:*:*:*",
"cpe:2.3:a:systemd_project:systemd:235:*:*:*:*:*:*:*"
],
"extracted_events": [
{
"introduced": "223"
},
{
"last_affected": "223"
},
{
"introduced": "224"
},
{
"last_affected": "224"
},
{
"introduced": "225"
},
{
"last_affected": "225"
},
{
"introduced": "226"
},
{
"last_affected": "226"
},
{
"introduced": "227"
},
{
"last_affected": "227"
},
{
"introduced": "228"
},
{
"last_affected": "228"
},
{
"introduced": "229"
},
{
"last_affected": "229"
},
{
"introduced": "230"
},
{
"last_affected": "230"
},
{
"introduced": "231"
},
{
"last_affected": "231"
},
{
"introduced": "232"
},
{
"last_affected": "232"
},
{
"introduced": "233"
},
{
"last_affected": "233"
},
{
"introduced": "234"
},
{
"last_affected": "234"
},
{
"introduced": "235"
},
{
"last_affected": "235"
}
],
"source": "CPE_STRING"
}